| 释义 |
trapezium
 trapeziumtra·pe·zi·um T0327300 (trə-pē′zē-əm)n. pl. tra·pe·zi·ums or tra·pe·zi·a (-zē-ə) 1. Mathematics a. A quadrilateral having no parallel sides.b. Chiefly British A trapezoid.2. Anatomy A bone in the wrist at the base of the thumb.
[Originally, a quadrilateral with two parallel sides (later confused with trapezoid, originally, a quadrilateral having no parallel sides), from Modern Latin trapezium, a quadrilateral with two parallel sides, from Late Greek trapezion, from Greek, diminutive of trapeza, table : tra-, four; see kwetwer- in Indo-European roots + peza, foot; see ped- in Indo-European roots.]trapezium (trəˈpiːzɪəm) n, pl -ziums or -zia (-zɪə) 1. (Mathematics) chiefly Brit a quadrilateral having two parallel sides of unequal length. Usual US and Canadian name: trapezoid 2. (Mathematics) chiefly US and Canadian a quadrilateral having neither pair of sides parallel3. (Anatomy) a small bone of the wrist near the base of the thumb[C16: via Late Latin from Greek trapezion, from trapeza table] traˈpezial adjtra•pe•zi•um (trəˈpi zi əm)
n., pl. -zi•ums, -zi•a (-zi ə) 1. a. (in Euclidean geometry) any rectilinear quadrilateral plane figure not a parallelogram. b. a quadrilateral plane figure of which no two sides are parallel. c. Brit. trapezoid (def. 1a). 2. the mammalian wrist bone that articulates with the metacarpal of the first digit or thumb. [1545–55; < New Latin < Greek trapézion kind of quadrilateral, literally, small table, diminutive of trápeza table, shortening of *tetrapeza=tetra- four + -peza foot, akin to poús; see tetra-, foot] tra•pe′zi•al, adj. tra·pe·zi·um (trə-pē′zē-əm) A four-sided figure having no parallel sides.Thesaurus| Noun | 1. |  trapezium - a quadrilateral with no parallel sidesU.S.A., United States, United States of America, US, USA, America, the States, U.S. - North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776quadrangle, quadrilateral, tetragon - a four-sided polygonparallelogram - a quadrilateral whose opposite sides are both parallel and equal in length | | 2. |  Trapezium - a multiple star in the constellation of Orionmultiple star - a system of three or more stars associated by gravity | | 3. |  trapezium - the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpalsos trapezium, trapezium bonecarpal, carpal bone, wrist bone - any of the eight small bones of the wrist of primates |
TranslationsTrapeztrapeciotrapezoidetrapeziotrapezoideтрапецияTrapezium
trapezium1. Chiefly Brit a quadrilateral having two parallel sides of unequal length 2. Now chiefly US and Canadian a quadrilateral having neither pair of sides parallel 3. a small bone of the wrist near the base of the thumb Trapezium (tră-pee -zee-ŭm) A very young open cluster of stars, protostars, gas, and dust that lies in the Orion nebula and is part of the Orion association. There are four prominent young main-sequence stars, which form the multiple star θ1 Orionis and are of spectral class O6, B1, B1, and B3. These stars excite and ionize the nebula. They form a trapezium and are visible with a small telescope.Trapezium the multiple star θ1 Orionis, located in the middle part of the Great Nebula of Orion. The star has nine known components, the four brightest of which (A, B, C, and D in Figure 1) form the vertices of a trapezium.  Figure 1. The Trapezium; the arrows at six of the stars indicate their proper motions over 1,000 years and the tangential velocity components on the scale indicated in the figure
In 1949, V. A. Ambartsumian discovered a number of similar stellar systems, in which the distances between components are of the same order of magnitude. Such systems came to be called Trapezium-type multiple stars. The periodic orbital motions observed in ordinary multiple stars are unlikely in Trapezium systems; consequently, such systems should be regarded as unstable and in the process of breaking up. According to Ambartsumian’s determinations, Trapezium systems break up in a few million years. It follows that such systems observed at the present time cannot be older than a few million years and are therefore young formations. A considerable number of Trapezium-type multiple stars are found in stellar associations. trapezium[trə′pē·zē·əm] (mathematics) A quadrilateral where no sides are parallel.
Trapezium[trə′pē·zē·əm] (astronomy) Four very hot stars that appear to the eye as a single star in the Great Nebula of Orion; the star symbol is M42. trapezium
trapezium [trah-pe´ze-um] an irregular, four-sided figure.tra·pe·zi·um, pl. tra·pe·zi·a, tra·pe·zi·ums (tra-pē'zē-ŭm, -ă), 1. A four-sided geometric figure with no two sides in parallel. 2. Synonym(s): trapezium (bone) [G. trapezion, a table or counter, a trapezium, dim. of trapeza, a table, fr. tra- (= tetra-), four, + pous (pod-), foot] trapezium (trə-pē′zē-əm)n. pl. trape·ziums or trape·zia (-zē-ə) 1. Mathematics a. A quadrilateral having no parallel sides.b. Chiefly British A trapezoid.2. Anatomy A bone in the wrist at the base of the thumb.tra·pe·zi·um, pl. trapezia, trapeziums (tră-pē'zē-ŭm, -ă, -ŭmz) 1. A four-sided geometric figure having no two sides parallel. 2. The lateral (radial) bone in the distal row of the carpus; it articulates with the first and second metacarpals, scaphoid, and trapezoid bones.
Synonym(s): os trapezium [TA] , greater multangular bone, os multangulum majus, trapezium bone. [G. trapezion, a table or counter, a trapezium, dim. of trapeza, a table, fr. tra- (= tetra-), four, + pous (pod-), foot]trapezium
Antonyms for trapeziumnoun a quadrilateral with no parallel sidesRelated Words- U.S.A.
- United States
- United States of America
- US
- USA
- America
- the States
- U.S.
- quadrangle
- quadrilateral
- tetragon
Antonymsnoun a multiple star in the constellation of OrionRelated Wordsnoun the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpalsSynonyms- os trapezium
- trapezium bone
Related Words- carpal
- carpal bone
- wrist bone
|